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Finding the Fourth Proportional to 111,006.51, 153,137.05 and 72,755.88

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Solution

The fourth proportional to 111,006.51, 153,137.05 and 72,755.88 is: 100,369.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,006.51 : 153,137.05 = 72,755.88 : x
  2. Step 2: Convert to fraction form
    111,006.51/153,137.05 = 72,755.88/x
  3. Step 3: Cross multiply
    111,006.51x = 153,137.05 × 72,755.88
  4. Step 4: Simplify right side
    111,006.51x = 11,141,620,469.57
  5. Step 5: Solve for x
    x = 11,141,620,469.57/111,006.51
  6. Step 6: Final answer
    x = 100,369.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.